On Tuesday 27 December 2005 16:55, M. Feenstra wrote:
> Hi,

> I'm experimenting with UML and have 2 UML guests running on a host with
> 1024M of memory. If I give the UML guests 128M of memory all is fine. If I
> give it 384 (or even 256) the UML guest boots until "VFS: Mounted root
> (ext2 filesystem) readonly." and then freezes.. no oops.. nothing.. only
> thing I can do is kill it.

> I have read in the archive a simular topic in october of this year but
> didn't find the answer to this issue.

> I run a debian UML kernel       : 2.4.26-3um on the guest

> I run a home-patched skas kernel: 2.6.12.6-skas3-v9-pre7 on the host
> (debian)

> The debian UML kernel is build using this settings for "General Setup" (so
> no HIGHMEM for example):

> I set the value /proc/sys/vm/max_map_count to 262144 (should allow to 1G
> guests right?).
Yes.

> Any hints on this item???

Using a more recent kernel, disabling TT mode (which helps for big amounts of 
memory, but only on recent enough kernels - >= around 2.6.9, IIRC), enabling 
static linking.
-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

        

        
                
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